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5391/Meter - RG354695
L5391/Meter - RG354695

Description

This block mimics a meter in a display band on an L5391 operator station.

In order to be displayed, this function block must be specified in either a page handler or display handler function block.

A number of parameters are required to set up the meters display.  For the above example, if the meter is to display line speed (Legend) in feet per minute and 100% corresponds to 3000 feet per minute.  The display must range from 0 to 2400 feet per minute with a redline of 2100 feet per minute. The format string is #### FPM, the gain is 3000, the display max is 80% (2400/3000), the display min is 0%, the high redline is 70% (2100/3000) and the low redline is 0%.

Parameters

Measured Value	Input to the meter.  Expects a value (-100% to +100%).

Get Measured Value	Returns the current value displayed on the meter:  -100% to +100%.

Legend	A string of up to approximately 16 characters may be specified for the legend.

Format	A format string specifies how the measured value will be displayed in the digital readout part of the display.  This is done through the use of special characters.

# is used to indicate a digit position.

- is used to indicate the position of the sign.

. is used to indicate the position of the decimal point.

Other than these special characters, the string may contain unit legends, etc.  Up to five digits may be specified and the decimal may be placed anywhere within them (or omitted).

Gain	This defines the on-display representation of 100% measured value; it may range from 10 to 10 000.  Note that the decimal point should be ignored when determining gain; its position is specified in the format string.

Display max	This defines the maximum measured value that may be displayed on the analog mimic part of the display.  (-100% to +100%).

Display min	This defines the minimum measured value that may be displayed on the analog mimic part of the display.  (-100% to +100%).

High redline	This is equivalent to the redline on conventional meters.  If the measured value exceeds the high limit, the display pointer is highlighted.  (-100% to +100%).

Low redline	This is equivalent to the redline on conventional meters.  If the measured value falls below the high limit, the display pointer is highlighted.  (-100% to +100%).


Description

This block mimics a meter in a display band on an L5391 operator station.

In order to be displayed, this function block must be specified in either a page handler or display handler function block.

A number of parameters are required to set up the meters display.  For example, if the meter is to display line speed (Legend) in feet per minute and 100% corresponds to 3000 feet per minute.  The display must range from 0 to 2400 feet per minute with a redline of 2100 feet per minute. The format string is #### FPM, the gain is 3000, the display max is 80% (2400/3000), the display min is 0%, the high redline is 70% (2100/3000) and the low redline is 0%.


Parameters

Measured Value	Input to the meter.  Expects a value (-100% to +100%).

Get Measured Value	Returns the current value displayed on the meter:  -100% to +100%.

Legend	A string of up to approximately 16 characters may be specified for the legend.

Format	A format string specifies how the measured value will be displayed in the digital readout part of the display.  This is done through the use of special characters.

# is used to indicate a digit position.

- is used to indicate the position of the sign.

. is used to indicate the position of the decimal point.

Other than these special characters, the string may contain unit legends, etc.  Up to five digits may be specified and the decimal may be placed anywhere within them (or omitted).

Gain	This defines the on-display representation of 100% measured value; it may range from 10 to 10 000.  Note that the decimal point should be ignored when determining gain; its position is specified in the format string.

Display max	This defines the maximum measured value that may be displayed on the analog mimic part of the display.  (-100% to +100%).

Display min	This defines the minimum measured value that may be displayed on the analog mimic part of the display.  (-100% to +100%).

High redline	This is equivalent to the redline on conventional meters.  If the measured value exceeds the high limit, the display pointer is highlighted.  (-100% to +100%).

Low redline	This is equivalent to the redline on conventional meters.  If the measured value falls below the high limit, the display pointer is highlighted.  (-100% to +100%).